| 单词 | metallic return |
| 释义 | > as lemmasmetallic return metallic return n. Telegraphy the wire completing a metallic circuit. ΚΠ 1928 A. Williams Telegr. & Telephony ix. 131 The first telephone companies had a hard fight to interest the public in their services, and to keep down costs—which would have been nearly doubled by a metallic return—only one wire was used for each subscriber. < as lemmas |
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